Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 103, Issue 1, Pages 297-303Publisher
WILEY
DOI: 10.1111/jace.16727
Keywords
electrical properties; ionic conductivity; rare earths
Categories
Funding
- Japan Society for the Promotion of Science [JP16H06438, JP16H06440, JP16H06441, JP17H05482]
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The effect of the structural environment on the Cl- ion conductivity was demonstrated in LaOCl-based solid electrolytes. By replacing the La3+ site with lower-valent Mg2+ or Ca2+ ions, the conductivity was enhanced owing to the formation of a Cl- ion vacancy. Despite the same dopant content, the conductivity of La0.8Ca0.2OCl0.8 was considerably greater than La0.8Mg0.2OCl0.8. This enhancement of the conductivity was influenced by the high ionicity of the Cl- ions, which facilitated the weakening of the La-Cl bond cleavage to conduct inside the lattice. The elongation of the La-La distance, associated with the Cl- ion conduction, could also cause an increase of the conductivity.
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